329 分岐管を有する管路における動的流動不安定と気柱振動

概要

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Self-sustained oscillation of a main pipe containing closed side-branches is often encountered in engineering application. This is considered as one of cavity resonances, and for example may occur in a pipe with branches leading to the safety valves, to boiler relief valves and so on. In this paper, we perform a numerical simulation study taking the ratio of width and depth of a branch and the configuration of side-branches (single, tandem, and co-axial branches) as parameters by using computational fluid dynamics (CFD). Then, we investigate the numerically obtained Strouhal number and acoustic response pressures by comparing with the experimental value reported by Rockwell and others. And, performing numerical simulation of tandem and co-axial branches, the dynamical mechanism and the physical meaning on the amplification of acoustical resonance are considered by comparing with a single branch.
一般社団法人日本機械学会の論文
2002-09-13